You can only post messages if you are logged on as player of simcountry. You must also have a country in one of the worlds. New members can join the forum about 48 hours after registration.
If you login with email address and password at https://www.simcountry.com, you will post under your registered First- and Lastname.
If you login as President or CEO in a simcountry world, the name of the world will be displayed with every Message that you post or New Conversation that you start. This is preferred if you want to discus 'world' related subjects as Trade, Federations and Common Markets.